arm/mach-omap2/sram242x.S

1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3  * linux/arch/arm/mach-omap2/sram242x.S
9  * Richard Woodruff <r-woodruff2@ti.com>
31 	stmfd	sp!, {r0 - r12, lr}	@ save registers on stack
39 	str	r3, [r2]		@ go to L1-freq operation
62 	mov r9, #0x0			@ shift back to L0-voltage
67 	str	r3, [r2]		@ go to L0-freq operation
69 	/* reset entry mode for dllctrl */
82 	ldmfd	sp!, {r0 - r12, pc}	@ restore regs and return
86 	mov	r4, #0x800		@ delay DLL relock, min 0x400 L3 clocks
94 	 * wait for it to finish, use 32k sync counter, 1tick=31uS.
101 	orr	r5, r5, r9		@ bulld value for L0/L1-volt operation.
109 	add	r5, r5, #0x3		@ give it at most 93uS
113 	bhi	volt_delay		@ not yet->branch
127 	.word	. - omap242x_sram_ddr_init
136 	stmfd	sp!, {r0 - r10, lr}	@ save registers on stack
150 	cmp	r0, #0x1		@ going to half speed (post branch link)
164 	moveq	r9, #0x1		@ if speed down, post down, drop volt
185 	ldmfd	sp!, {r0 - r10, pc}	@ restore regs and return
189      *	wait for it to finish, use 32k sync counter, 1tick=31uS.
196 	orr	r8, r8, r9		@ bulld value for L0/L1-volt operation.
204 	add	r8, r8, #0x2		@ give it at most 62uS (min 31+)
208 	bhi	volt_delay_c		@ not yet->branch
225 	.word	. - omap242x_sram_reprogram_sdrc
232 	stmfd	sp!, {r0-r12, lr}	@ regs to stack
263 	bne	wait_a_bit		@ delay done?
277 	bne	wait_more		@ delay done?
301 	ldmfd	sp!, {r0-r12, pc}	@ restore regs and return
317 	.word	. - omap242x_sram_set_prcm